Resolution:Cable sizes are based on Table 310.15 of the National ElectricalCode 2014 (NEC) with the following assertions:

• 90 °C conductors (THHN) for 75 °C termination• Not more than three current carrying conductors in each conduit• An ambient temperature of 30 °C• Use of copper or Aluminum conductors• 100% rated breakers

If the ambient room temperature is greater than 30 °C, use larger or additionalparallel conductors in accordance with the correction factors of the NEC. Themaximum allowable conductor size is 600 kcmil.